Given an array of integers, this problem asks you to find the lowest positive integer that is not present in the array. You are to do this in linear time and constant space.
The candidate's solution is correct and solves the problem. The approach is to sort the array and then iterate through it to find the first missing positive integer. This solution is optimal because it is linear time and constant space.
Evaluated at: 2022-11-23 00:16:45